OFFICIAL MAF flow rate lb/min flow rate thread!

Gibbo205 · Sep 23, 2016

Hi there

For fun and good comparison reasons those who datalog their cars please post your maf flow rate lb per min rate along with your modifications please:

My Results
Stock intake, stock filter, stock tube, Velossa: 42lb@6400rpm
Stock intake with panel filter & air raid MIT, Velossa Big Mouth, stock RHD headers: 42.5lb/min @ 6400rpm
PMAS CAI "tune required" with no snorkels, Velossa, stock RHD headers: 45lb/min @ 6520rpm
PMAS "tune required" with snorkels for lower IAT, Velossa, stock RHD headers: 45.5lb/min @ 6600rpm

So I am seeing a peak now of 45.5lb/min with the PMAS CAI on the stock GT intake manifold at 6600rpm.

I am hopeful with LT headers and 350 intake manifold and 350 TB this will go over 50lb/min.

What MAF flow rate lb/min are others seeing on their cars and what are your modifications?

I think if we can get as many results as possible this will truly show us which CAI's flow the best, as we all know more flow equals more power.

Terminator2 · Sep 23, 2016

Gibbo205 said:
Hi there

For fun and good comparison reasons those who datalog their cars please post your maf flow rate lb per min rate along with your modifications please:

My Results
Stock intake, stock filter, stock tube, Velossa: 42lb@6400rpm
Stock intake with panel filter & air raid MIT, Velossa Big Mouth, stock RHD headers: 42.5lb/min @ 6400rpm
PMAS CAI "tune required" with no snorkels, Velossa, stock RHD headers: 45lb/min @ 6520rpm
PMAS "tune required" with snorkels for lower IAT, Velossa, stock RHD headers: 45.5lb/min @ 6600rpm

So I am seeing a peak now of 45.5lb/min with the PMAS CAI on the stock GT intake manifold at 6600rpm.

I am hopeful with LT headers and 350 intake manifold and 350 TB this will go over 50lb/min.

What MAF flow rate lb/min are others seeing on their cars and what are your modifications?

I think if we can get as many results as possible this will truly show us which CAI's flow the best, as we all know more flow equals more power.

47.2lbs/min at 6800 is the most I've seen. 1 7/8" Long Tubes, catless X, dynomax race bullets, Pmas intake, custom tune by me. Most likely will be 52-53lbs/min with the GT350 intake manifold.

Stock was 42lbs/min max at 6400.

Gibbo205 · Sep 23, 2016

Terminator2 said:
47.2lbs/min at 6800 is the most I've seen. 1 7/8" Long Tubes, catless X, dynomax race bullets, Pmas intake, custom tune by me. Most likely will be 52-53lbs/min with the GT350 intake manifold.

As in the UK we do not have headers, do you know if LT headers also help improve flow of the intake?

In theory they should do and even more so on a RHD car as Ford crippled our RHD headers. :(

P.S. Was your stock 42lb/min@6400 also on stock headers?

Rebellion · Sep 23, 2016

Seems to be about a 5% increase (correcting for RPM) due to the PMAS alone...not a bad deal!

Gibbo205 · Sep 23, 2016

Rebellion said:
Seems to be about a 5% increase (correcting for RPM) due to the PMAS alone...not a bad deal!

At 6400rpm it is 45.33lb/m, the peak is just before 6600rpm. Can certainly feel it in top-end too, especially since the flow/IAT modifications I did for the intake, the drop off in flow rate is less beyond 6600rpm.

I need headers and 350 IM next.

Terminator2 · Sep 23, 2016

Gibbo205 said:
As in the UK we do not have headers, do you know if LT headers also help improve flow of the intake?

In theory they should do and even more so on a RHD car as Ford crippled our RHD headers. :(

P.S. Was your stock 42lb/min@6400 also on stock headers?

Headers absolutely improve flow especially with the Pmas and I guarantee the GT350 manifold with everything else will really shine. Flow with headers on stock box went from 42 to 44.5 so 2.5 lbs/min. Both the headers and Pmas both added 2.5lbs/min. Each lb/min is worth roughly 10hp.

Gibbo205 · Sep 23, 2016

Terminator2 said:
Headers absolutely improve flow especially with the Pmas and I guarantee the GT350 manifold with everything else will really shine. Flow with headers on stock box went from 42 to 44.5 so 2.5 lbs/min. Both the headers and Pmas both added 2.5lbs/min. Each lb/min is worth roughly 10hp.

That is awesome news, I suspect on a UK car headers will yield around 3lb/s min then because the RHD headers are crippled from factory to accomodate the steering column. :(

Still that would put me at 48-48.5lb/s per min with headers. So much for my IAT reducing modifications reducing the flow, if anything they have improved it as predicted.

kcc0521 · Sep 23, 2016

Does the density of the air based on weather conditions affect this?

Terminator2 · Sep 23, 2016

kcc0521 said:
Does the density of the air based on weather conditions affect this?

Absolutely yes. DA matters here.

Gibbo205 · Sep 23, 2016

Terminator2 said:
Absolutely yes. DA matters here.

I always do my testing on the same stretch of road and always in dry weather, to try and keep results consistent and comparable.

GSLSE20B · Sep 23, 2016

dont forget to add fuel trims , maf lb/min is inferred

Terminator2 · Sep 23, 2016

GSLSE20B said:
dont forget to add fuel trims , maf lb/min is inferred

Mine are within 1-2%. Pmas MAF transfer data was basically perfect. Car idles better than stock now.

GSLSE20B · Sep 23, 2016

@ stated max lb/min . I've looked at many other persons datalogs that are in .9-1. range at idle and low rpm , but show 55-60lbs/min with 10% correction at wot .

Terminator2 · Sep 23, 2016

GSLSE20B said:
@ stated max lb/min . I've looked at many other persons datalogs that are in .9-1. range at idle and low rpm , but show 55-60lbs/min with 10% correction at wot .

I'm -0.8 LTFT and +0.08 to -0.08 STFT at wide open throttle.

Gibbo205 · Sep 23, 2016

GSLSE20B said:
@ stated max lb/min . I've looked at many other persons datalogs that are in .9-1. range at idle and low rpm , but show 55-60lbs/min with 10% correction at wot .

Some of my datalogs attached that I did today for Lund.

Lund said the fuelling was spot on but the car can punch harder so they just sent me a new tune with some extra timing, I shall get this put on the car later.

You think you could check them, let me know your thoughts.

OFFICIAL MAF flow rate lb/min flow rate thread!

Gibbo205

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Terminator2

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Gibbo205

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Rebellion

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Gibbo205

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Terminator2

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Gibbo205

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kcc0521

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Terminator2

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Gibbo205

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GSLSE20B

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